Add support for setting security labels on devtmpfs nodes created
by misc class drivers using misc_register.

Signed-off-by: Namjae Jeon <[email protected]>
Signed-off-by: Vivek Trivedi <[email protected]>
---
 drivers/char/misc.c        | 5 +++++
 include/linux/miscdevice.h | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 63fb739..42fc006 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -274,6 +274,11 @@ static char *misc_devnode(struct device *dev, umode_t 
*mode,
 
        if (mode && c->mode)
                *mode = c->mode;
+       if (xattr && xattr->value && c->xattr_value) {
+               xattr->name = c->xattr_name;
+               strcpy(xattr->value, c->xattr_value);
+               xattr->value_len = strlen(xattr->value);
+       }
        if (c->nodename)
                return kstrdup(c->nodename, GFP_KERNEL);
        return NULL;
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 819077c..bcc3d8e 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -64,6 +64,8 @@ struct miscdevice  {
        const struct attribute_group **groups;
        const char *nodename;
        umode_t mode;
+       const char *xattr_name;
+       const char *xattr_value;
 };
 
 extern int misc_register(struct miscdevice *misc);
-- 
1.8.5.5

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